Réponses

2012-10-16T21:14:23+02:00

1)x²+x-2X-2+3x-6+7x²+14

ya plus qu'a simplifier

2012-10-16T21:17:30+02:00

(x-2)(x+1)+(3-7x)(x-2)=(x^2+x-2x-2)+(3x-6-7x^2+14x)=-6x^2+16x-8

factorisation

(x-2)(x+1)+(3-7x)(x-2)=(x-2)((x+1)+(3-7x))=(x-2)(x+1+3-7x)=(x-2)(-6x+4)

bonne chance